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UNITED STATES OAMILLE A. FA'URE AND GEORGE TRENUH,

PATENT OFFICE.

or FAVER-SHAM, ASSIGNORS LAND.

DETONATQRL SPECIFICATION forming part of Letters Patent No. 233,406,dated October 19, 1880.

- r Application filed May 11, 1880. (No specimens.) Patented inGreatBritain January 15, 1877.

To all whom it may concern:

Be it known that we, OAMILLE ALPHONSE FAURE and GEORGE TRENGH, both ofFaversham, in the county of Kent, England, have invented newv and usefulImprovements in Detonators, which improvements are fully set forth inthe following specification- Hitherto the composition of detouatingtubesor detonators has been either fulmiuate of mercury alone or mixed-withchlorate of potash or with piorate of lead and chlorate of potash, orsome such compositions as belong to the gunpowder class properly.

Now we make our detonators by mixing together the fulminate of mercury,while wet, with very finely-ground gun-cotton and some chlorate ofpotash, about in the proportion, by weight, of six parts of f'uhninateand one part each of gun-cutton and chlorate of potash.

The water in which the fuhninate of marcury is usually stored is firstdrained ofit' and replaced by displacement, by ether or alcohol, or amixture of the two. While the fulminate of mercury is still-moist withether the guncotton and chlorate of potash are added, and

minate of mercury,

the mixture well rubbed together. This pasty compound is nextdistributed in detonator caps, tubes, or shells by the aid of suitableapparatus, each detonator-having the paste pressed firmly in it. Thepressure should be gradually increased until the requisite force isexerted to properly compress the compound into the detonator.

We'claim as of our own invention-- 1. The detonating compound formed offulgun cotton, and chlorate of pot-ash, substantially as and about inthe proportions hereinbefore set forth.

2. The before-described detonatonconsisting of a cap, tube, or shellsupplied with the compound formed of fulminateof mercury about sixparts, and gun-cotton and chlorate of potash about one part each,substantially as herein before set forth.

G. A. AURE. G. TR NGH. Witnesses:

G. W. WESTLEY, T. J. OSMAN,

Both of No.17 Graccch-urch Street, London.

